Plasmonic gap waveguides allow for light confinement below the diffraction limit. In combination with an impedance matched nanoantenna they can be excited from the far field [1,2]. In this contribution we investigated nanoantennas coupled to gap plasmonic waveguides with a Near-field Scanning Optical Microscope (NSOM), but also experimentally demonstrate the coupling of far-field optical beams to highly confined plasmonic gap modes.

© 2011 IEEE

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